Growli

Plant care

Starry Solomon's Seal (Starry false Solomon's seal) care

Maianthemum stellatum

Also called Starry Solomon's seal, Starry false Solomon's seal, Star-flowered lily of the valley.

RHS H7USDA 3-7Mildly toxic to petsIndoor 30–60 cm tall (12–24 in)

Watering rhythm

Medium indirect light (a couple of metres from a window)

Regular, keeping soil evenly moist

Light

Medium indirect light (a couple of metres from a window)

Soil

Humus-rich, moist, well-drained, acidic to neutral

Humidity

Moderate to high

Temp

-35 to 25°C

Pet safety

Mildly toxic to pets

Mature size

30–60 cm tall (12–24 in)

Care at a glance

Light

Picture the indirect light an east-facing window gives mid-morning — that's the brightness starry solomon's seal grows fastest in. Thrives in part shade to full shade, receiving dappled or filtered light under deciduous tree canopy; foliage will scorch in direct afternoon sun. You'll know it's right when new leaves come out the same size and colour as the established ones. Smaller, paler new leaves = move closer to the window.

Watering

Aim for regular, keeping soil evenly moist for starry solomon's seal, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Water consistently to maintain even soil moisture, particularly during dry spells; established plants tolerate brief drought but perform best with a reliable moisture supply.

Soil and pot

Starry Solomon's Seal grows best in humus-rich, moist, well-drained, acidic to neutral. Prefers loose, organic-rich woodland soil with a pH of 5.0–7.0; incorporate leaf mould or compost at planting to replicate its native forest-floor conditions. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Starry Solomon's Seal sits happiest at around Moderate to high humidity and -35 to 25°C (-31 to 77°F). Naturally suits the ambient humidity of shaded woodland gardens; no supplemental humidity is needed when grown outdoors in moist sites. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed starry solomon's seal sparingly. Apply a light top-dressing of well-composted leaf mould each spring; additional feeding is rarely necessary in organically rich soil. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on starry solomon's seal in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Sawfly larvae (Phymatocera species)Solomon's seal sawfly caterpillars can completely defoliate stems in late spring; hand-pick larvae or apply an appropriate insecticide as soon as feeding is noticed.
  • Slug and snail damageEmerging shoots in spring are vulnerable to slug and snail feeding, leaving ragged holes in leaves; use iron-phosphate pellets or set traps around new growth.

Propagation

Divide rhizomes in early spring or autumn when plants are dormant; can also be grown from seed sown fresh in autumn, though germination is slow and irregular. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Starry Solomon's Seal is mildly toxic to pets. The berries and rhizomes contain steroidal saponins; Maianthemum stellatum is not individually listed by the ASPCA. Related Maianthemum species are documented to contain saponins that can cause gastrointestinal upset (vomiting, diarrhoea) in cats and dogs. Do not assume safe — keep pets away from berries and foliage. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Starry Solomon's Seal care — frequently asked questions

What is the common name for Maianthemum stellatum?

Maianthemum stellatum is most commonly called Starry Solomon's Seal, but it is also known as Starry Solomon's seal, Starry false Solomon's seal, Star-flowered lily of the valley. The names refer to the same species, so care instructions for Starry Solomon's Seal apply identically to anything sold as Starry false Solomon's seal.

How much light does starry solomon's seal need?

Starry Solomon's Seal grows best in medium indirect light (a couple of metres from a window). Thrives in part shade to full shade, receiving dappled or filtered light under deciduous tree canopy; foliage will scorch in direct afternoon sun.

How often should I water starry solomon's seal?

Water starry solomon's seal regular, keeping soil evenly moist. Water consistently to maintain even soil moisture, particularly during dry spells; established plants tolerate brief drought but perform best with a reliable moisture supply. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is starry solomon's seal toxic to cats and dogs?

Starry Solomon's Seal is mildly toxic to pets. The berries and rhizomes contain steroidal saponins; Maianthemum stellatum is not individually listed by the ASPCA. Related Maianthemum species are documented to contain saponins that can cause gastrointestinal upset (vomiting, diarrhoea) in cats and dogs. Do not assume safe — keep pets away from berries and foliage.

What USDA hardiness zone does starry solomon's seal grow in?

Starry Solomon's Seal is rated for USDA zone 3-7 and RHS hardiness H7. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Starry Solomon's Seal deep-dive guides

Every aspect of starry solomon's seal care, each with its own calibrated guide:

Featured in these plant shortlists

Starry Solomon's Seal qualifies for 6 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Starry Solomon's Seal is also known as Starry Solomon's seal, Starry false Solomon's seal, and Star-flowered lily of the valley.